Coin bank



FIG. 1 is a perspective view of a coin bank showing my new design in a closed configuration;

FIG. 2 is a side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is another perspective view of a coin bank showing my new design in an open configuration;

FIG. 8 is a side view thereof;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof; and,

FIG. 11 is a top view thereof.

The broken lines shown in the drawings represent portions of the coin bank that form no part of the claimed design. 

CLAIM The ornamental design for a coin bank, as shown and described. 